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Diffstat (limited to 'trunk/lib/rubygems/old_format.rb')
| -rw-r--r-- | trunk/lib/rubygems/old_format.rb | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/trunk/lib/rubygems/old_format.rb b/trunk/lib/rubygems/old_format.rb deleted file mode 100644 index ef5d621f52..0000000000 --- a/trunk/lib/rubygems/old_format.rb +++ /dev/null @@ -1,148 +0,0 @@ -#-- -# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. -# All rights reserved. -# See LICENSE.txt for permissions. -#++ - -require 'fileutils' -require 'yaml' -require 'zlib' - -module Gem - - ## - # The format class knows the guts of the RubyGem .gem file format - # and provides the capability to read gem files - # - class OldFormat - attr_accessor :spec, :file_entries, :gem_path - - ## - # Constructs an instance of a Format object, representing the gem's - # data structure. - # - # gem:: [String] The file name of the gem - # - def initialize(gem_path) - @gem_path = gem_path - end - - ## - # Reads the named gem file and returns a Format object, representing - # the data from the gem file - # - # file_path:: [String] Path to the gem file - # - def self.from_file_by_path(file_path) - unless File.exist?(file_path) - raise Gem::Exception, "Cannot load gem file [#{file_path}]" - end - File.open(file_path, 'rb') do |file| - from_io(file, file_path) - end - end - - ## - # Reads a gem from an io stream and returns a Format object, representing - # the data from the gem file - # - # io:: [IO] Stream from which to read the gem - # - def self.from_io(io, gem_path="(io)") - format = self.new(gem_path) - skip_ruby(io) - format.spec = read_spec(io) - format.file_entries = [] - read_files_from_gem(io) do |entry, file_data| - format.file_entries << [entry, file_data] - end - format - end - - private - ## - # Skips the Ruby self-install header. After calling this method, the - # IO index will be set after the Ruby code. - # - # file:: [IO] The IO to process (skip the Ruby code) - # - def self.skip_ruby(file) - end_seen = false - loop { - line = file.gets - if(line == nil || line.chomp == "__END__") then - end_seen = true - break - end - } - if(end_seen == false) then - raise Gem::Exception.new("Failed to find end of ruby script while reading gem") - end - end - - ## - # Reads the specification YAML from the supplied IO and constructs - # a Gem::Specification from it. After calling this method, the - # IO index will be set after the specification header. - # - # file:: [IO] The IO to process - # - def self.read_spec(file) - yaml = '' - begin - read_until_dashes(file) do |line| - yaml << line - end - Specification.from_yaml(yaml) - rescue YAML::Error => e - raise Gem::Exception.new("Failed to parse gem specification out of gem file") - rescue ArgumentError => e - raise Gem::Exception.new("Failed to parse gem specification out of gem file") - end - end - - ## - # Reads lines from the supplied IO until a end-of-yaml (---) is - # reached - # - # file:: [IO] The IO to process - # block:: [String] The read line - # - def self.read_until_dashes(file) - while((line = file.gets) && line.chomp.strip != "---") do - yield line - end - end - - - ## - # Reads the embedded file data from a gem file, yielding an entry - # containing metadata about the file and the file contents themselves - # for each file that's archived in the gem. - # NOTE: Many of these methods should be extracted into some kind of - # Gem file read/writer - # - # gem_file:: [IO] The IO to process - # - def self.read_files_from_gem(gem_file) - errstr = "Error reading files from gem" - header_yaml = '' - begin - self.read_until_dashes(gem_file) do |line| - header_yaml << line - end - header = YAML.load(header_yaml) - raise Gem::Exception.new(errstr) unless header - header.each do |entry| - file_data = '' - self.read_until_dashes(gem_file) do |line| - file_data << line - end - yield [entry, Zlib::Inflate.inflate(file_data.strip.unpack("m")[0])] - end - rescue Exception,Zlib::DataError => e - raise Gem::Exception.new(errstr) - end - end - end -end |